FILCO® 355 stands as a modified epoxy resin formulated within a non-ionic water emulsion, specifically employed as a film-former in glass fiber sizings, particularly suited for woven roving applications. It presents as a milky liquid and is available in a liquid physical form. Notable material features include good flexibility and the provision of a non-tacky surface.

Functions: Film Former

Chemical Family: Epoxy & Epoxy Derivatives

Compatible Polymers & Resins: Epoxies (EP), Unsaturated Polyester (UPE)

Technical Data Sheet

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Identification & Functionality

Composite Materials Functions

Features & Benefits

Characteristics of Film
  • Clear, not tacky
  • Compatible with unsaturated polyester and epoxy resins
  • Glass transition temperature Tg= 11-14°C
  • Soluble in styrene

Applications & Uses

Compatible Polymers & Resins
Compatible Reinforcements


Physical Form
Milky liquid
Typical Properties
ValueUnitsTest Method / Conditions
Solid Content42 - 44%MA145LFE
pH2 - 3-MA148LFE
Particle Size Distribution
ValueUnitsTest Method / Conditions
Average Particle Size400 - 800nmMA147LFE

Packaging & Availability

Regional Availability
  • Canada
  • Mexico
  • USA

Storage & Handling

Shelf Life
12 months
Storage and Shelf Life Conditions

FILCO® 355 should be stored in closed containers away from direct sun rays, at temperature between +5 and +30°C. In these conditions maximum suggested storage time is 12 months from production, in the original package. After that date product must be rechecked. Prevent from freezing.